光码分多址多比特传输系统性能分析

:多比特传输是光码分多址通信的一种方案。本文对光码分多址多比特传输系统的误码性能进行了理论分析和计算机数字仿真。在系统中存在光电检测器散粒噪声、暗电流噪声、背景光、热噪声的情况下 ,分别对无光硬件限幅器和引入一个光硬件限幅器的多比特传输系统进行讨论 ,得出相应的误比特率表达式 ,该表达式明确、具体。分析结果表明 ,当接收功率较大时 ,多比特传输系统的误码性能优于相应的单比特传输系统。

Performance analysis of optical code division multiple access multi-bits transmission system

In this paper,bit error performance and computer digital simulations of optical code division multiple access multi bits transmission system are given In the case that photodiode shot noise,dark noise,background light,thermal noise are present,the system without an optical hard limiter and with an optical hard limiter are discussed respectively,and bit error probability is derived The analysis and the simulation results show that if received power is larger,the performance of multi bits transmission system is superior to one bit transmission system